Stem tube cap for bikes



FIG. 1 is a perspective view of a stem tube cap for bikes showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is an assembled view showing the stem tube cap for bikes in a position of use; and,

FIG. 9 is a sectional view taken along line 9-9 shown in FIG. 8.

The broken lines shown in FIGS. 8 and 9 represent environmental structure that forms no part of the claimed design. 

The ornamental design for a stem tube cap for bikes, as shown and described. 